Safety device for guardrail in use in shipyards

ABSTRACT

A safety device for guardrail in use in shipyards, wherein the guardrail includes a plurality of stanchions constrained on the edge of a hull of a vessel and a lifeline. The device includes a plurality of rods defining an axis of extension and capable of being arranged along at least part of the guardrail, and one or more nets constrained in succession to the rods to define a continuous containment bulkhead. Each rod is detachably constrained to a respective stanchion in correspondence with at least two constraint areas mutually spaced along the extension axis to prevent translation of the rod with respect to the stanchion along at least one plane skew with respect to the guardrail.

The present invention relates to a safety device for guardrail used in shipyards of the type specified in the preamble of the first claim.

In particular, the present invention relates to a safety device for guardrail of small or medium-sized vessels used in shipyards mainly for the protection of maintenance workers or the crew of vessels from falling from above.

As is known, almost all small or medium-sized vessels include a guardrail, that is a perimetric portion of the vessel in correspondence with which metal poles, denominated stanchions, constrained by one or more cables, are fixed, with more or less regularity. of metal placed in tension, denominated lifelines.

Generally, the lifelines connect the stanchions at least at their ends and, in addition, at one or more intermediate points arranged along the extension of the stanchions themselves.

Furthermore, the stanchions are usually constrained to the edges of the hull by means detachable constraints such as, for example, bolting or other similar constraint means.

In traditional configurations, the edges of the hull have cavities inside which at least part of the base of the stanchions themselves is housed. Alternatively, the stanchions are inserted, being usually hollow at the lower end, in a pin of variable material, for example metal, resins or carbon, which protrudes at the edge defined by the boat's gun for a length between 15-25 cm. The stanchions inserted on the pin are then locked to the pin itself with a common grain.

The guardrail thus made substantially defines a support bulkhead for the users on board in such a way as to increase their safety and prevent people, or even objects on board the boat from being easily thrown from it, in navigation phase, without any obstacles.

The height of the guardrails, mainly given by the part of the stanchions protruding from the hull, is usually between 40 and 90 cm since these heights are sufficient to carry out their functions when the vessel is at sea.

Of course, like all the transport means, vessels are subject to maintenance and, therefore, need to be temporarily placed inside dry docks within shipyards. During maintenance works, each vessel builds a building site on its own and, therefore, as for construction sites, each vessel must necessarily be able to comply with certain safety regulations.

In particular, it is necessary for the operators to observe the standards and parameters indicated in the EN 1263-1 and EN 1263-2 regulations referring, even more in detail, to the characteristics of the fall-protection nets.

These nets, in addition to including specific materials, such as polyethylene and/or other high quality synthetic fibers, and being water-repellent, light and very resistant, must be able to determine a minimum height of the slide equal to 120 cm. In order to meet the regulations, during the maintenance of the vessels in the dry docks, external scaffolding is built in such a way as to create side barriers, of adequate height, able to guarantee the safety of workers.

Naturally, the construction of an external support structure, such as a scaffolding, involves a very high expenditure of time and work and, in fact, it often happens that the maintenance phases are actually performed outside the norm, in an unsafe manner.

In order to circumvent the regulations, signs prohibiting access to the vessel are often posted on shipyards which, however, are never really respected during processing, but are only useful for evading any safety inspections.

If present, the common guardrail, suitably in use during navigation and certainly not having the resistance characteristics of a fall-protection net, can be kept constrained to the stanchions as a fall-protection bulkhead.

However, even if present, the guardrail net has the drawback that the slide is too low to meet the regulations.

In this situation the technical task underlying the present invention is to devise a safety device for guardrail in use in shipyards capable of substantially obviating at least part of the aforementioned drawbacks.

Within the scope of said technical task, an important object of the invention is to obtain a safety device for guardrail in use in shipyards which allows to make the maintenance and access of vessels in dry docks safe.

Another important object of the invention is to provide a safety device which allows to comply with the regulations in force within shipyards, reducing, however, the costs in terms of time and labor of installing the safety device.

A further aim of the invention is to provide a simple and easily transportable safety device, for example, on board of the vessel itself.

In conclusion, a further object of the invention is to provide a safety device that is also safe for passers-by under or near the vessel, preventing objects from falling. The technical task and the specified aims are achieved by a safety device for guardrail in use in shipyards as claimed in the annexed claim 1.

Preferred technical solutions are highlighted in the dependent claims.

The characteristics and advantages of the invention are clarified below by the detailed description of preferred embodiments of the invention, with reference to the accompanying figures, wherein:

the FIG. 1 shows a safety device for guardrail in use in shipyards according to the invention installed on the guardrail of a vessel;

the FIG. 2 a shows a perspective view of part of a safety device for guardrail in use in shipyards according to the invention in a first configuration wherein the rod is not constrained outside the stanchions;

the FIG. 2 b is a side view of the device FIG. 2 a;

the FIG. 3 a shows a view in section normal to the axis of extension of the constraining means of a safety device for the guardrail in use in shipyards according to the invention wherein the rod is constrained to the cursor, the cursor is constrained to second collar and the second collar is constrained to the stanchion;

the FIG. 3 b shows a view in section normal to the axis of extension of the constraining means of a safety device for guardrail in use in shipyards according to the invention wherein the rod is constrained directly to the first collar and the first collar it is constrained to the stanchion;

the FIG. 4 illustrates a side view of a safety device for guardrail in use in shipyards according to the invention wherein the containment bulkhead is skewed with respect to the guardrail;

the FIG. 5 is a view in detail of a rod of a safety device for guardrail in use in shipyards according to the invention constrained within the housing of a perforated stanchions;

the FIG. 6 a is a perspective view of part of a safety device for guardrail in use in shipyards according to the invention in a second configuration wherein the rod is partially inserted within the housing of the stanchion; and

the FIG. 6 b shows a side view of the device of FIG. 6 a.

In the present document, the measurements, values, shapes and geometric references (such as perpendicularity and parallelism), when associated with words like “about” or other similar terms such as “approximately” or “substantially”, are to be considered as except for measurement errors or inaccuracies due to production and/or manufacturing errors, and, above all, except for a slight divergence from the value, measurements, shape, or geometric reference with which it is associated. For instance, these terms, if associated with a value, preferably indicate a divergence of not more than 10% of the value.

Moreover, when used, terms such as “first”, “second”, “higher”, “lower”, “main” and “secondary” do not necessarily identify an order, a priority of relationship or a relative position, but can simply be used to clearly distinguish between their different components.

Unless otherwise specified, as results in the following discussions, terms such as “treatment”, “computing”, “determination”, “calculation”, or similar, refer to the action and/or processes of a computer or similar electronic calculation device that manipulates and/or transforms data represented as physical, such as electronic quantities of registers of a computer system and/or memories in, other data similarly represented as physical quantities within computer systems, registers or other storage, transmission or information displaying devices.

The measurements and data reported in this text are to be considered, unless otherwise indicated, as performed in the International Standard Atmosphere ICAO (ISO 2533:1975).

With reference to the figures, the safety device for guardrail in use in shipyards according to the invention is globally indicated with the number 1.

The guardrail 10 is a portion of a boat substantially housed along at least part of the edge 12 of the hull.

This guardrail 10 creates a barrier, usually with a maximum height of 90 cm, which limits the possibility for users to be thrown out of the vessel.

The edge 12 of the hull is substantially the perimetric portion of the vessel seen in plan view, or from above, and therefore delimits the extension of the walkable portion of the vessel.

The guardrail 10, as known, includes a plurality of stanchions 11.

The stanchions 11 are substantially stakes, tubular or solid, constrained on the edge 12.

Substantially, therefore, the stanchions 11 are elements protruding from the edge 12 arranged on the edge 12 itself in an orderly manner.

Finally, the guardrail 10 includes at least one lifeline 13. The lifeline 13 is a high-strength cable which connects in succession the stanchions 11 of the guardrail 10. The lifeline 13 is usually tensioned and can include steel material.

Furthermore, the lifeline 13 is usually housed in slots arranged in correspondence with the free end of the stanchions 11, but could equally well be placed in other points of the extension of the stanchion 11. Furthermore, the guardrail 10 preferably comprises a plurality of lifelines 13 extending with continuity between one stanchions 11 and the other, but placed along different points of the extension of the stanchions 11.

Usually, in substance, the lifelines 13 are parallel cables constrained in succession to the stanchions 11 in such a way as to be perpendicular to them, so that the rail 10 substantially defines a railing or balustrade for the vessel.

The safety device 1 is substantially configured to be constrained, in use, to the guardrail 10.

In this regard, preferably, the device 1 includes a plurality of rods 2.

The rods 2 can be solid elements or tubular elements. In any case, the rods 2 are elongated elements, or rather elongated and having a substantially beam shape in which one dimension is preponderant with respect to the other two.

Therefore, each rod 2 preferably defines an extension axis 2 a.

The extension axis 2 a is substantially the prevailing development axis of the rod 2. Naturally, each rod 2, being elongated in shape, defines two ends.

In particular, preferably, each rod 2 defines a first end 21 and a second end 22.

The first end 21 is substantially capable of being turned, in use, towards the edge 12. The second end 22 is, on the other hand, opposite the first end 21.

The rods 2, moreover, are preferably able to be arranged along at least part of the guardrail 10.

In fact, it is not necessary for the device 1 to extend along the entire guardrail 10, but it is sufficient for it to extend even only along a part, for example in the vicinity of an area of the vessel undergoing maintenance work in the shipyard. However, it is desirable, even if not necessary, for safety reasons, for the device to extend over the entire guardrail 10.

The rods 2 can have any size. However, they preferably define dimensions, along the extension axis 2 a, comprised at least between 30 cm and 150 cm. Even more in detail, they can define dimensions between 40 cm and 140 cm. Even more conveniently, dimensions between 50 cm and 130 cm.

In general, the rods 2 are configured to extend above, with respect to the edge 12, the free end of the stanchions 11.

The device 1 also comprises one or more nets 3.

The net 3 or the nets 3 are linked in succession to the rods 2.

In this way, the net or the nets 3 define with the rods 2 a containment bulkhead 3 a. The containment bulkhead 3 a can be continuous or discontinuous depending on how the device 1 is configured. Preferably, the containment bulkhead 3 a is continuous along the rail section 10 on which the device 1 is constrained. Furthermore, the device 1 can include also a single net 3 defined by a roller that can be rolled around the guardrail 10 and constrained to the rods 2; or the device 1 can include a plurality of nets 3 constrained, for example, between two rods 2 consecutively arranged along the edge 12.

The net 3, preferably, is a common fall-protection net. In this regard, it may comprise polymeric material such as, for example, polyethylene or other water-repellent synthetic fibers.

Of course, there is nothing to prevent the use of nets 3 of different types, possibly also metallic.

Preferably, in any case, the nets 3 should be resistant and, at the same time, light. The containment bulkhead 3 a preferably extends along the extension axis 2 a up to the free end of the rods 2, as shown in the FIGS. 1, 2 a, 6 a.

Therefore, the nets 3 substantially define a plane having dimensions compatible with the rods 2. For example, preferably, each net 3 extends along the extension axis 2 a by a dimension which coincides with the dimension of the rod 2.

Furthermore, the net 3 or the nets 3, could include a reinforcing portion 30.

If present, the reinforcement portion 30 is capable of being arranged, in use, adjacent to the edge 12 on the bottom of the containment bulkhead 3 a.

In particular, the reinforcing portion 30 can be a thicker and more rigid part of net 3. Alternatively, the reinforcement portion can be made with external reinforcements, such as panels, applicable on the mesh 3. Preferably, the reinforcement portion 30 is made with polymeric panels, for example in PVC, in such a way as to prevent the falling of objects, even of small dimensions such as bolts or similar.

Advantageously, the device 1 is not, in at least one configuration, integrated in the stanchions 11. In fact, each rod 2 is detachably constrained to at least one respective stanchion 11.

Each rod 2 could, of course, also be linked to several candlesticks 11, for example two adjacent stanchions 11 along the edge 12. However, it is preferable that each rod 2 is constrained to a single respective stanchion.

The term detachably means that, when not in use, each rod can be easily removed from the rail 10 in such a way as not to disfigure the original configuration of the guardrail 10 and, therefore, the aesthetic conformation of the vessel.

In particular, each rod 2 is constrained to a stanchion in correspondence with at least two attachment zone 20.

The attachment zones 20 are substantially zones of direct or indirect contact between rod 2 and stanchion 10. Preferably, the attachment zones 20 are mutually spaced along the extension axis 2 a. These attachment zones 20 are configured in such a way as to prevent the translation of the rod 2 with respect to the stanchions 11 along at least one plane askew with respect to the guardrail 10.

In particular, preferably, the translation of the rod 2 a is prevented along a plane perpendicular to the extension of the guardrail, which may or may not be parallel to the plane defined by the edges 12 of the vessel.

In fact, it is not unusual to find side rails 10 constrained obliquely to the edges 12, or diverging with respect to the walkable area of the vessel.

To guarantee the constrained between the rod 2 and at least one stanchion 11, the device 1 comprises attachment means 4.

The attachment means 4 are preferably configured to constrain each rod 2 to at least one respective stanchion 11 in correspondence with the attachment zones 20. Furthermore, in a preferred embodiment, the attachment means 4 are configured to allow reciprocal translation, to command, between the rod 2 and the stanchion 11 along a direction parallel to the axis of extension 2 a.

In this configuration, therefore, the rods 2 can substantially behave as extensions of the stanchions 11. In fact, if the axis of extension 2 a is substantially parallel to the prevailing development axis of the stanchion 11, the rods 2 behave like extensions of stanchions 11. If, on the other hand, the extension axis 2 a is skewed with respect to the stanchion 11, then the rods 2 are not real extensions, and the containment bulkhead 3 a is not aligned with the guardrail 10, but possibly skewed with respect to thereto, as shown schematically in FIG. 4 .

The attachment means 4 can therefore be configured in various ways.

In the preferred embodiment, shown in FIGS. 2 a-3 b and 4, the attachment means 4 comprise a first collar 40 and a second collar 41.

In particular, the first collar 40 and the second collar 41 are preferably laid on the stanchions 11 in such a way as to create the attachment zones 20.

Substantially, therefore, the attachment zones 20 are defined by the area wherein the first collar 40 are arranged and the second collar 41.

In particular, preferably, the collars 40, 41 can be closed collars. Or, they can be openable collars, as shown in the FIGS. 3 a-3 b , for example including two specular portions constrained by hinge and bolting.

Alternatively, the collars 40, 41 can be of another type, for example including two constraining points with bolting, or they can be deformable, for example rubber collars.

The collars 40, 41 are, in any case, preferably also constrained to the rod 2.

The constraint with the rod 2 can be made directly or indirectly. For example, the collars 40, 41 can be constrained by means of screws, bolts or other known attachment means, in such a way as to be substantially blocked with respect to the rod 2. In other words, the rod 2 could comprise the collars 40, 41 in such a way as to be constrained on command to the stanchions 11.

Preferably, in an alternative configuration of the preferred embodiment, the attachment means 4 also comprise a cursor 42.

The cursor 42 is preferably constrained in a compliant way to the rod 2. In particular, the cursor 42 is configured to be able to slide, on command, along the extension axis 2 a. In this way, it is possible to adjust the height of the attachment zone 20 with respect to the stanchions 11.

Furthermore, the cursor 42 is constrained to at least one of the first collar 40 and the second collar 41. In this way at least one of the first collar 40 and the second collar 41 is indirectly constrained to the rod 2. Furthermore, at least one of the collars 40, 41 realizes a constraint in a compliant way, on command, between the rod 2 and the stanchions 11.

In a configuration shown in FIG. 2 b , for example, the cursor 42 is constrained to the second collar in correspondence with the part of the rod 2 and of the stanchion 11 from the edge 12.

Furthermore, the first collar 40 is not constrained in a compliant way to the rod 2. Obviously, the attachment means 4 could, in this configuration, also comprise a second cursor 42 constrained to the first collar in such a way as to make the constraints between rod 2 and stanchion 11 defined by the collars 40, 41 as compliant.

Therefore, the attachment means 4 allow to control the distance between the attachment zones 20 in such a way as to be able to control the resistance to possible stresses due to moments acting on the containment bulkhead 3 a, for example due to impacts of users.

The collars 40, 41 and the slider 42 may, in addition, include a rubberized inner surface. If present, this internal surface is able to increase the friction between the rod 2 or the stanchion 11 and one between the collars 40, 41 and the cursor 42 constrained on the rod 2 or on the stanchion 11. In addition, the internal rubberized surface avoids or strongly reduces the wear of the external surface of the stanchion 11 on which the collars 40, 41 or the cursor 42 are mounted.

In this configuration, moreover, the first end 21 of the rod 2 could be suspended with respect to the edge 12, or could be in contact with the edge 12 itself.

In case the rod 2 is configured, by means of the attachment means 4, to come into contact with the edge 12, the first end 21 could comprise a base 21 a.

If present, the base 21 a includes partially yieldable material. The term yielding also means only deformable.

In this way, the base 21 a is configured to come into contact with the edge 12 in such a way as to define a support constraint between the rod 2 and the edge 12.

The advantage of including the base 21 a is given above all by the fact of increasing the connection points between rod 12 and the vessel, in particular by adding the support between rod 2 and edge 12, and to avoid the possibility of tears on edge 12 due, for example, to the relative movement between rod 2 in the event of impacts on the containment bulkhead 3 a.

The attachment means 4 could also be different with respect to what has been described.

In a second embodiment, shown in the FIGS. 5-6 b, the attachment means 4 could be defined by a portion of the stanchion 11 and a portion of the rod 2.

In the second embodiment, the device 1 therefore collaborates with the stanchions 11 which are part of the safety apparatus 100 which includes the device 1 and the stanchions 11 made ad hoc.

In this sense, each stanchion 11 can be constituted by a partially tubular element including at least one housing 11 a.

The housing 11 a is therefore preferably accessible from the outside at least on command. Optionally, the housing 11 a can be made inaccessible through the use of a plug to be applied on the stanchion 11. However, in this configuration, the housing 11 a is in any case accessible from the outside on command since access can be made simply removing the plug described.

The housing 11 a is, in any case, preferably configured to house, in whole or in part, the rod 2 of the device 1. Therefore, the housing 11 a can extend along the entire stanchion or only part of it along the axis extension 2 a. In this sense, unlike conventional stanchions 11, the stanchion 11 of the safety apparatus 100 is configured to allow the constraint of the guardrails 13 on the external surface of the stanchions 11. In other words, the slots do not pass through the stanchions 11, but are preferably located externally in such a way as not to obstruct the housing 11 a or part of it.

Preferably, in this embodiment, the first end 21 of the rod 2 can be configured to be inserted inside the housing 11 a.

Alternatively, the rod 2 can be housed entirely inside the housing 11 a and can be configured to be at least partially extracted, on command, from the housing 11 a.

In this second configuration, in particular, the device 1 is substantially inserted inside the stanchion 11, when the safety apparatus 100 is not in use, and the rod 2 can be extracted, on shipyard, from the housing 11 a in such a way that the second end 22 emerges from the stanchion 11 and is moved away from the edge 12.

In any case, the attachment means 4 are, in this second embodiment, made at least by the housing 11 a and by the first end 21.

Also in this case, the first end 21 may include a base 21 a as described above. In this configuration, in particular, the stanchions 11 and the rod 2 are centered together and, in particular, part of the rod 2 is, in use, inserted in the stanchion 11. As already mentioned, when the safety apparatus 100 is not in use, the rod 2 can be entirely extracted with respect to the stanchion 11, or it can be entirely housed inside the housing 11 a. Therefore, preferably, the rod 2 can define dimensions compatible with the stanchion 11.

Naturally, in both cases, they can be included in the rod 2 or in the stanchion 11 or in both locking means such as, for example, the common pressure locking means adopted in any portable and removable tubular structure. Such locking means can usually include snap buttons, movable in opposition to elastic means, widely known in the state of the art and used to reciprocally lock elements, for example tubular and concentric coupled.

It should be noted that, also in this case, the stanchion 11 and the rod 2 are constrained, in use, in at least two separate attachment zones 20 and, indeed, each stanchion 11 and rod 2 are constrained in a plurality of attachment zone 20 which extend continuously along the extension axis 2 a. Naturally, at least two attachment zones 20, for example the attachment zone 20 at the base 21 a and the attachment zone 20 at the end of the stanchion 11, are mutually separated.

Regardless of the embodiment, the device 1 preferably also includes at least one cable 5.

The cable 5 is preferably constrained in tension to the rods 2 in such a way as to connect the rods 2 in succession.

Basically, therefore, the cable 5 performs a strengthening function on the rods 2 similar to the lifelines 13 present on the stanchions 11.

In order to allow the constraint of the cable 5, preferably, each rod 2 preferably includes at least one slot 20 a.

The slot 20 a is preferably configured to house at least part of the cable 5. Furthermore, preferably, the rods 2 can each include more than one slot 20 a.

The device 1 can therefore include a plurality of cables 5 passing substantially on the plane of the net or nets 3 and, in this sense, also acting as a reinforcement for the nets themselves.

The slots 20 a can therefore be positioned at any point of the rod 2 along the extension axis 2 a.

In particular, preferably, at least one slot 20 a is arranged at the second end 22 in such a way that at least one cable 5 substantially delimits the containment bulkhead 3 a.

The operation of the safety device for railing used in shipyards 1 previously described in structural terms is as follows.

The user, once the vessel has been positioned in the dry dock of a shipyard, can secure the walkable surface by installing the device 1 on the rail 10. In particular, by constraining the rods 2 to the stanchions 11 and the net or nets 3 on the rods 2, a containment bulkhead 3 a is made which has a height sufficient to allow compliance with the standards while having sufficient impact resistance.

It is therefore no longer necessary to adopt external scaffolding or try to evade the rules with warning signs that are promptly disregarded by the experts.

The invention includes a new method of outfitting a boat in a shipyard for boat maintenance.

In particular, the method includes the device 1.

Furthermore, it includes, avoiding to set up external scaffolding or to irregularly circumvent the regulations, at least one constraint and one hooking phase.

In the constraint phase, substantially, each rod 2 is constrained to a respective stanchion 11 in correspondence with at least two attachment zone 20. As already explained, in the second embodiment, the attachment zones 20 can be even more than two and can extending continuously along the portion of the extension axis 2 a in which the rod 2 is housed in the housing 11 a, as shown in FIG. 6 b.

In particular, in the second embodiment, the constraint phase can substantially coincide with a extraction phase by the housing 11 a or introduction into the housing 11 of a rod 2 inside each stanchion 11 as defined for the safety apparatus 100.

In particular, if the rod 2 is extracted, only the second end 22 comes out of the housing 11 a, if the rod 2 is inserted, the second first end 21 is inserted into the housing 11 a.

In the coupling phase, the net or nets 3 are constrained on the rods 2 defining a containment bulkhead 3 a as previously described.

The coupling can take place according to any method. The rods 2 can provide hooks on which to house part of the nets 2, as occurs for example in common removable football goals currently on the market, or other methods can be envisaged, for example it is also possible to use only bands, or openable and resealable rings. Or it is possible to tie portions of net 3 to rod 2 by means of knotted strings, or more.

In general, it is preferable that the constraint between nets 3 and rods 2 is still detachable without having to break the nets 3 in order to be able to assemble and disassemble as desired and, above all, if necessary, the safety device 1.

The safety device for guardrail used in shipyards 1 according to the invention achieves, in fact, important advantages.

The device 1 is substantially portable, easy to install and transportable, and allows a vessel to be secured as desired without the need for external scaffolding.

In particular, the device 1, whether it is mounted on the stanchions 11 or partially inserted therein in a safety apparatus 100, makes it possible to make the maintenance of the vessel safe in the dry docks where the workers often, in the absence of scaffolding ad hoc, they find themselves working in irregular conditions. Therefore, the device 1 allows to reduce the costs in terms of time and labor of making a vessel safe in a shipyard.

Furthermore, the device 1 has a great resistance to impacts, since the conformation of the constraint areas allows to regulate its behavior avoiding that, upon the occurrence of mechanical moments deriving from impacts, the containment bulkhead 3 a is bent.

Furthermore, also by virtue of the reinforcing portion 30, the fall of any small objects is prevented. Therefore, the device 1 makes it possible to make the construction site safe even with respect to people passing by the vessel.

The invention is susceptible of variants falling within the scope of the inventive concept defined by the claims.

For example, as already mentioned, the net 3 and the rods 2 could be of any shape and material. Furthermore, the containment bulkhead 3 a is not necessarily coplanar with respect to the guardrail 10, but can also be inclined with respect to it. In case of containment bulkhead 3 a coplanar with respect to the guardrail 10 and inclined guardrail 10, it may be useful to consider rods and nets with extensions, with respect to the extension axis 2 a, greater than those indicated in such a way as to maintain compliance at least with the regulations previously indicated.

In this context, all the details can be replaced by equivalent elements and the materials, shapes and dimensions can be any. 

1. A safety device for a guardrail in use in shipyards, said guardrail including a plurality of stanchions attached to the edge of a vessel's hull and at least one lifeline, and said device comprising: a plurality of rods each defining an extension axis and designed to be arranged along at least part of said guardrail, and one or more nets attached in succession to said rods in such a way as to define a containment bulkhead, and each rod is detachably attached to at least one corresponding said stanchion at least two attachment zones mutually spaced apart along said extension axis to prevent said rod moving in relation to said stanchion along at least one plane that is skew in relation to said guardrail.
 2. The device according to claim 1, comprising attachment means configured to attach each said rod to at least one corresponding said stanchion at least said attachment zones and to enable reciprocal movement, on command, between said rod and said stanchion along a direction parallel to said extension axis.
 3. The device according to claim 2, wherein said attachment means comprise a first collar and a second collar configured to be laid on said stanchion, making said attachment zones, and attached to said rod.
 4. The device according to claim 3, wherein said attachment means comprise at least one slider loosely attached to said rod in such a way that the slider can slide, on command, along said extension axis and at least one of either said first collar or said second collar is attached to said slider to make at least one loose attachment, on command, between said rod and said stanchion.
 5. The device according to claim 1, wherein one or more of said collars and said slider includes an inner surface that is rubberised to increase the friction between said rod or said stanchion and one of either said collars and said slider attached to said rod or said stanchion.
 6. The device according to claim 1, comprising at least one cable that is attached to said rods under tension to connect said rods in succession.
 7. The device according to claim 6, wherein each rod comprises at least one slot configured to house at least part of said cable.
 8. The device according to claim 1, wherein each rod defines a first end designed to face, in use, said edge and a second end opposite said first end, and said first end includes a base including material at least partially pliable and configured to come into contact with said edge to define a support attachment between said rod and said edge.
 9. The device according to claim 1, wherein said net includes at least one reinforcement portion designed to be arranged, in use, adjacent to said edge on the bottom of said containment bulkhead.
 10. A safety apparatus comprising a device according to claim 1 and a stanchion consisting of an element that is at least partly tubular including a housing accessible from the outside, wherein each rod is configured to be inserted or withdrawn by sliding within said housing, said attachment means being made from said housing and said first end.
 11. A procedure for equipping a vessel in a shipyard for the maintenance of said vessel including a device according to claim 1, comprising: mutually attaching each said rod to a corresponding stanchion at at least said two attachment zones, hooking said one or more nets on said rods defining said containment bulkhead. 